The Pearl Index, also called the Pearl rate, is the most common technique used in clinical trials for reporting the effectiveness of a birth control method.
Read more about Pearl Index: Calculation and Usage, History, Criticisms
Famous quotes containing the words pearl and/or index:
“For the first fourteen years for a rod they do whine,
For the next as a pearl in the world they do shine,
For the next trim beauty beginneth to swerve,
For the next matrons or drudges they serve,
For the next doth crave a staff for a stay,
For the next a bier to fetch them away.”
—Thomas Tusser (c. 1520–1580)
“Exile as a mode of genius no longer exists; in place of Joyce we have the fragments of work appearing in Index on Censorship.”
—Nadine Gordimer (b. 1923)